Lug strap and method of making



Aug. 20, 1935. 'w. I BULLARD LUG` STRAP AD METHOD 0F MAKING Filed Jan.'7, 1933 2 Sheets-Sheet 1 Patented ug. 20, w35

T?? E S ML'ZM p i @wie 2,011,794 LUG staar AND METHOD or MaxineWashington Irving Bullard, Danielson, Conn., as-

signor to E. H. Jacobs Manufacturing Company,

Danielson, Conn.

My present invention relates to lug straps for use in looms, and isdirected to an improved reinforced lug strap and to a novel method ofmaking same.

Heretofore it has been customary to form such stand the impact blowsfrom the lug straps of a plurality of layers of canvas, either made flator in a U-shaped die, uniting the same by means of suitable cement intoa substantially strong textile article suitable to Withpicker stick inthe operation of a loom. i In my prior Patent No. 1,775,077, datedSeptember 2, 1930, I have illustrated and described an improved lugstrap and a novel method of making same, and the present invention is anadvanced improvement in the construction of such articles.

In'carrying out my present invention I have devised a novel method forthe reinforcement. Such reinforcing is important, particularly at thebow and at'the bolt slots, and as shown in my said prior patent suchreinforcement was provided by the addition of separate pieces in theformation of the article. However, such prior practice was objectionablein that it made separate bunches where the reinforcing was applied andcaused difficulty in the subsequent pressing operation, and wasobjectionable also as producing reinforcing at spaced points without anycorresponding intermediate strengthening.

My present invention obviates the diiculties above briefly outlined andprovides a combined strengthened structure reinforced at the bolt slotsas well as at the bow portion, with an increased strength as desired atthe` bow portion, and presenting a smooth, uniform, and taperedstrengthened structure throughout.

I may accomplish this desirable result with any degree of reinforcing orstrengthening desired, as by` utilizing a single additional textilereinforcing layer, or by using a plurality of such layers, and alsohaving the same of varying extent, weight, and strength as desired.

In carrying out my present invention the preferred method employed is toapply to the entire width of the canvas or textile layer from which thelug strap is made a/special reinforcing layer, or layers, of triangularor square, contour; if square, then with the same positioned diamondlikerelatively with the sheet from which the lug strap is to be made, thusapplying the same at the beginning of the interrolling operation bywhich the layers or plurality of layers of textile material are rolledand cemented into lug strap form for subsequent compressingvintoU-shape.

Such forms are made Very at or straight and compressed, or in U-shapedform as desired. This method with the pointed portion of the layerapproximately in the middle of the sheet forms an increasingstrengthened'reinforcing at the 5 middle, which will be the bow portion,as theY layers are interrolled into lug strap form of dsired length,width and thickness.

Referring to the drawings illustrating preferred embodiments and method,

Fig. l is a plan view showing the operation of applying the reinforcingstrap;

Fig. 2 is an enlarged cross-sectional view illustrating the interrollinglug structure when completed;

Figs. 3 and 4 are plan and cross-sectional views, respectively,illustrating the compressing action showing the veven taper afforded bymy present invention;`

Figs. 5 and 6 are top and side views respec- 20 tively of the completedlug strap;

Fig. 7 illustrates a modification using a small reinforcing layer Fig. 8shows the use of a plurality of layers both for body structure andreinforcing;

Fig. 9 is a cross-sectional view illustrating the compressing actionwith an extra leather layer at the bow;

Fig. 10 is illustrative of the shaping action, and

Fig. l1 shows a reinforced lug strap of the 30 block type.

As shown in Figs. 1 and 2, a canvas or textile sheet I is cut intosuitable width for the length of lug strap' desired and of suitablelength for the width and thickness into which the same is to be 35rolled. To such a piece of fabric I I apply my novel reinforcing sheet 2with the greatest diameter approximately equal to the width of the sheetI and with the same positioned diamondwise relatively with one piecewith the inner 40 point 3 approximately in the middle width-wise 0f thesheet I, and with the lower point 4 folded thereover, as shown in dottedlines at 5.

The canvas thus assembled is coated with suitable adheslive, rolled withthe proper width into an interrolled structure, as best shown in Fig. 2,and constitutes lug strap I0, which is thus subjected to pressure asshown in Figs. 3 and 4, between the forms II` and I2 respectively andbetween upper and lower plates I4 and I5 respec- 50 tively of anysuitable die compress. As thus formed, it will be appreciated that thereinforcing layer 2 when interrolled affords an even, tapered,interrolled layer throughout the entire length of the lug strap I Il,the end portions la and I9 being slightly tapered over thecenter or bowportion 20, so that when the strap I thus formed is subsequently formed'into the completed lug strap of Figs. I and 6, it will have asubstantially uniformly tapered contour from the bow 20 tothe nds of thearms I8 and I9, with the reinforcement 2 both in the bow 20 and in eachof the bolt slots 2|.

Inthe form shown in Fig. 7 the base layer or sheet I has applied to it atriangular reinforcing member 25 with one apex of the triangle 26positioned midway between the sides of the sheet I and in the resultingposition of the bow of the completed lug strap. This layer alsoreinforces both the bolt slots 2I and the bow portion 2l)V My kpresentmethod and improved lug strap can also be readily equipped with afurther layer 33 of leather or the like around the bow portion 20 as isfrequently desired.

In Fig. 10 I have illustrated the forming of the lug strap in its nishedbow form between outer'clamps 35 'and aninner `mold 36. 'This can beemployed either in connection with the straight, presses or as animproved mold after the rolling and setting of the interrolled layersand the adhesive uniting them.

In Fig. 11 I have illustrated my improved reinforced and evenly taperedlug strap provided with a block 40 and a retaining bolt 4I, Where thistype of lug strap is desired.

It will be'appreciated that in the various forms of my invention, withthe reinforcinglayer as a square sheetas shown in Fig. 1, a half sheetor triangular, of Fig. 7, or a plurality of reinforcing layers either ofwhole or half sheets, as in Fig. 8, the positioning of the apex or anglemidway of the sides of the base sheets or members I, or I and 30,produces the greatest reinforcing thickness at the center or bow portionof the resultant lug strap, while the ends of the reinforcing layerprovide reinforcement for the bolt slots 2|. My improved lug strapprovides an automatically tapered and reinforced structure from the bowto each end; is easier to curve into' the nal form; is easier tocompressand to mold,` presenting no bulky portions, and constitutes theadvantage of a single reinforcement, covering both the slot bolts andthe bow portion with uniform strength between these parts.

I claim:

As a new article of manufacture, a lug strap of interrolled textilelayers united by adhesive, with one of the layers constituting acomplete reinforcing structure from one end of the, completed lug strapto the other end and surrounding the slotted portions adjacent each ofthe ends, said reinforcing layer being positioned angularly relativelywith the body of thev lug strap fabric and tapering uniformly to eachend.

WAsHmGToN IRVING VBULLARD.l

